Third Lake leans Democratic by roughly 20 points: about 60% of voters vote Democratic and 40% Republican.
About 76% of adults in Third Lake typically vote, above the U.S. average of about 62%. Among adults in Third Lake, ~46% vote Democratic, ~30% Republican, and ~24% don't vote. The map below shows estimated turnout by block group.
How Third Lake compares
Among cities within 25 miles, Third Lake leans more Democratic than 106 of 133 neighbors.
Third Lake runs about 9 points more Democratic than Illinois as a whole.
Politics vary noticeably by neighborhood within Third Lake. The east side runs the most Democratic (D+21) and the northwest side runs the most Republican (R+3), a spread of about 24 points.
Why Third Lake leans the way it does
This analysis examined 14,881 data points per city to find what predicts political lean and turnout. The items below are a few correlations that stood out for Third Lake, not a ranked or complete list of what matters most.
Areas with high college attainment vote Democratic. About 65% of adults in Third Lake hold a bachelor's degree, about 37 points above the U.S. average of 28%. Dense areas vote Democratic, and Third Lake sits in the top fifth on density (about 37%, above 83% of cities).
Walkability and Democratic lean
Places with a highly walkable street grid tend to lean Democratic; Third Lake, IL sits in the top tenth nationally on this measure. A walkable street grid does not change how people vote; it mostly reflects how urban a place is.
Why turnout in Third Lake looks the way it does
Areas with strong routine healthcare access turn out at higher rates. Third Lake is in the top quarter nationally for routine-care measures such as insurance coverage, preventive screenings, and dental visits. The dental-visit rate here is about 71%, about 11 points above the U.S. average of 60%. Homeowners vote more often than renters, and about 97% of households in Third Lake own their home, about 22 points above the U.S. average of 75%. High high-school completion lines up with higher turnout, and about 98% of adults in Third Lake have completed high school, above 95% of cities. Learn more about the findings and methodology on the political spectrum map.
Nearby Cities
- Gages Lake, IL D+14
- Grayslake, IL D+21
- Gurnee, IL D+22
- Hainesville, IL D+18
- Venetian Village, IL D+6
- Old Mill Creek, IL D+6
- Lindenhurst, IL D+4
- Round Lake Park, IL D+16
- Round Lake Beach, IL D+16
- Round Lake Heights, IL D+7
Cities with Similar Populations
- Canton, MN R+38
- Woodland, MS R+38
- Centerport, PA R+44
- Boyers, PA R+57
- Evansville, MN R+51
- Chappell, NE R+71
- Gilbert, LA R+70
- Shelby, NE R+68
- Florence, IN R+62
- Crowder, OK R+72
All Local Stats
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Sources and methodology
Precinct-level voting records used to fit the model come from Illinois State Board of Elections, distributed by the Voting and Election Science Team. Demographic inputs come from the U.S. Census Bureau (ACS 5-year estimates and the 2020 Decennial Census). Health and environmental inputs come from the CDC (PLACES and the Environmental Justice Index). Land cover comes from the USGS and EPA. Election-day and lead-up weather come from PRISM 4km daily grids and the NOAA Global Historical Climatology Network. Mail-voting and election-administration patterns come from the MIT Election Lab's Survey of the Performance of American Elections. Block-group crime detail comes from CrimeGrade. Internet data and modeling support provided by ISPreports.org.
Modeling and analysis by the BestNeighborhood data science team. Full methodology and findings: political spectrum map.
Methodology reviewed by the BestNeighborhood data team. Last updated May 2026.